Improvement in devices for converting circular into reciprocating motion



L. DAM E.

Devices for converting Circular into Reciprocating Motion.

No.135,697 Pateniedrebnmars.

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LUTHER DAME, OF NEWBURYPORT, MASSACHUSETTS.

IMPROVEMENT IN DEVICES FOR CONVERTING CIRCULAR INTO RECIPROCATING MOTIONI Specification forming part of Letters Patent No. l 35,697, dated February 11, 1873.

To all whom it may concern:

Be it known that I, LUTHER DAME, of Newburyport, in the county of Essex and State of Massachusetts, have invented a new and Improved Device for Converting Circular into Reciprocating Motion, of which the f'ollowing is a specification:

Figure l is a vertical section of my invention on the line x a', Fig. 2. Fig. 2 is a plan view of the same, and Fig. 3 is a vertical transverse sect-i011 of the cylinder on the line c c, Fig. 2.

Similar letters of reference indicate corresponding parts.

The object of my invention is to convert circular motion into reciprocating by means of a simple device which works without jar or noise,

being at the same time cheap, accurate, and

easy in its motion, and producing only a very slight degree of friction. My invention consists of a hollow cylinder with a longitudinal slot, into which a cylindrical core is closely fitted, gliding therein by means of a bolt connected with the core and running in the slot, applied eccentrically to a faceplate or shaft turned by a crank or other suitable arrange-` ment.

In the drawing, A represents a hollow cylinder of suitable metal, connected by wings a, cast or otherwise attached toit, with a fretsaw, sewing-machine, or other apparatus requirin g reciprocating motion. A longitudinal slot, b, of the cylinder, guides the bolt-nipple d, which is applied in suitable manner to the solid cylindrical core B, preferably made of wood, to decrease the friction of the same in the cylinder. Core B its closely into the cylinder A and is carried noiselessly back and forth therein. The bolt-nipple d is connected eccentrically to a faceplate or crank C in such manner that it can be adjusted to such a degree of eccentricity as to correspond to the length of stroke desired. The circular motion is transmitted to the shaft ofthe face-plate or crank C by any convenient power.

It is obvious that by this simple contrivan ce circular mot-ion is converted into reciprocating in an easy way, by which the different parts are not liable to get out of order, and may last a long time without being replaced.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The conversion of circular into reciprocating motion by means of adjustable eccentric C, connecting bolt-nipple d, .core B, longitudinal slot b, and hollow cylinder A, substantially as and for the purpose described.

LUTHER DAME.

Witnesses:

J. T. BROWN, E. T. BROWN. 

